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True or false? In 2010, the world population was estimated to be around 7 billion.
Which of these factors can explain the human population growth?
Higher breeding rate
Medicines to cure disease
Lower crime figures
Lack of natural predators
Why do heavy metal ions present such a danger to the land?
The poisons may accumulate up the food chain
The poisons kill many weeds growing on the land
The poisons make agricultural land infertile
What is eutrophication?
An old-fashioned term for natural selection
The "killing" of rivers and lakes through excessive algal blooms and increased bacterial presence denying organisms of oxygen
The cleaning up of rivers and lakes through the removal of fertilisers
Which air pollutants cause acid rain?
What type of air pollution are particulates responsible for?
True or false? The slash-and-burn process is often associated with peat bog destruction.
Which processes contribute greatly to excessive methane levels in the atmosphere?
Rice farming in paddy fields
Peat bog destruction
True or false? Plants and water sequester carbon dioxide.
True or false? The presence of any kind of greenhouse effect has negative impact on the environment.
Which chemical is used as a biofuel to replace petrol?
What type of process is using biofuels as a fuel source?
True or false? Biogas production is dependent on the anaerobic fermentation of waste.
What is the main, inflammable, component of biogas?
True or false? It is more energy-efficient for humans to eat meat than it is to eat plants.
Which of these processes are typical in factory farming?
Allowing animals to move around
Keeping animals physically restrained in small sheds
Keeping animals outdoors
Keeping animals in warm sheds
True or false? Fishing quotas can be ineffective as fisherman throw back dead fish that they are not allowed to catch.
Which fungus produces mycoprotein (Quorn)?
True or false? Dams have no negative environmental impact.
True or false? In 2009, there was a scandal when some British scientists hid data that did not support the theory of global warming.